憨勇
主要从事生物医用与仿生材料,先进涂层与薄膜材料、电解液等离子氧(碳、氮)化技术及其在有色金属表面改性的基础理论与应用研究。
个性化签名
- 姓名:憨勇
- 目前身份:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
材料科学
- 研究兴趣:主要从事生物医用与仿生材料,先进涂层与薄膜材料、电解液等离子氧(碳、氮)化技术及其在有色金属表面改性的基础理论与应用研究。
憨勇, 1995年于西北工业大学获博士学位,1996.1-1998.1于西安交通大学从事博士后研究,1997.9-1997.12赴法国特鲁瓦技术大学合作研究,2001.2-2002.1任韩国首尔大学博士后研究员,2001年授聘西安交通大学教授,2002年入选国家教育部“跨世纪优秀人才计划”,2003年授聘博士生导师。现为金属材料强度国家重点实验室副主任,国务院政府特殊津贴获得者,国家863计划和国家自然科学基金函评专家。兼任中国硅酸盐学会生物材料专业委员会委员、中国材料研究学会青年委员会理事、陕西省材料研究学会理事、“西安交通大学学报”编委、西安市组织工程工程技术研究中心副主任。
主要从事生物医用与仿生材料,先进涂层与薄膜材料、电解液等离子氧(碳、氮)化技术及其在有色金属表面改性的基础理论与应用研究。作为项目负责人主持国家、省部及企业科研项目17项,包括国家863计划项目1项、国家自然科学基金面上项目4项、国家自然科学基金重点项目子课题1项、教育部“跨世纪优秀人才计划”基金1项、陕西省攻关计划重点项目1项等。参加承担国家、省部级科研项目6项,包括国家973计划项目1项、国家自然科学基金面上项目1项、中-法政府间先进研究计划项目1项等。获陕西省科学技术奖一等奖1项(第一获奖人)、机械部科技进步二等奖1项(第四获奖人)、中国发明专利4项(第一发明人)。发表论文100余篇:其中,国外杂志论文35篇(包括影响因子在3.0以上的国外著名杂志论文11篇),国内重要核心期刊论文50余篇;被SCI收录44篇,被他人论文引用400余篇次。
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1647
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成果阅读
374
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成果数
9
憨勇, YONG HAN, KEWEI XU, JIAN LU
JOURNAL OF MATERIALS SCIENCE: MATERIALS IN MEDICINE 10(1999)243-248,-0001,():
-1年11月30日
Highly pure brushite
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【期刊论文】UV-enhanced bioactivity and cell response of micro-arc oxidized titania coatings
憨勇, Yong Han a, *, Donghui Chen a, Jifeng Sun a, Yumei Zhang b, Kewei Xu a
Acta Biomaterialia 4(2008)1518-1529,-0001,():
-1年11月30日
Using ultraviolet (UV) irradiation of micro-arc oxidized (MAO) titania coating in distilled water for 0.5 and 2 h, we have achieved an enhanced bioactivity and cell response to titania surface. The MAO coating appears porous and predominantly consists of nanocrystallized anatase TiO2. Compared with the MAO coating, the UV-irradiated coatings do not exhibit any obvious change in surface roughness, morphology, grain size and phase component; however, they have more abundant basic Ti-OH groups and become more hydrophilic because the water contact angle decreases significantly from 17.9
UV-light, Titania coating, Bioactivity, Cell response, Micro-arc oxidation
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【期刊论文】Porous nanocrystalline titania films by plasma electrolytic oxidation
憨勇, Y. Hana, b, S.-H. Honga, *, K.W. Xub
Surface and Coatings Technology 154(2002)314-318,-0001,():
-1年11月30日
Nanocrystalline titania films were prepared by plasma electrolytic oxidation of a titanium alloy at 200–350 V in a Na2CO3 electrolytic solution using a pulsed power supply. XRD, EDS and Field Emission (FE) SEM were employed to characterize the phase, composition, and microstructure of the films. Vickers indentation, nanoindentation and adhesion–tension test were used to evaluate the mechanical properties of the films. The phase, pore size and thickness of the films strongly depend on the applied voltage consistent with the previous reports. The films prepared at 350V were porous with; 1 mm pores and the pore walls were composed of 10-20 nm rutile crystallites. The hardness, Young's modulus and bond strength of the film were 0.9"0.2 GPa, 32"4 GPa and 37"3 MPa, respectively. The film exhibited a significant plasticity and ductility compared to the conventional coarse-grained titania ceramics.
Plasma electrolytic oxidation, Titania film, Nanocrystalline, Plasticity, Ductility
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【期刊论文】Structure and in vitro bioactivity of titania-based films by micro-arc oxidation
憨勇, Yong Hana, *, Seong-Hyeon Hongb, Kewei Xua
Surface and Coatings Technology 168(2003)249-258,-0001,():
-1年11月30日
Titania-based films on titanium were formed by micro-arc oxidation in electrolytic solutions containing sodium carbonate, sodium phosphate, acetate monohydrate and b-glycerophosphate disodium salt pentahydrate using a pulse power supply. The morphology, elemental composition and phase components of the films were investigated as a function of the electrolytes composition and the applied voltage (in the range of 200–500 V). In vitro bioactivity of the films was evaluated in a most commonly used simulated body fluid as proposed by Kokubo et al. The results showed that the films were porous with 1-8mm pores and nano-crystallized, without apparent interface to the titanium substrates. The phase components of the films could be anatase, rutile, CaTiO3, b-Ca2P2O7 and a-Ca3(PO4)2, strongly depending on the electrolytes composition and the applied voltage. The pore size and the content of Ca and P tended to increase with the applied voltage. Among the prepared titania-based films, only the film containing CaTiO3, b-Ca2P2O7 and a-Ca3(PO4)2 could induce an apatite layer on its surface, exhibiting bioactivity. The bioactive response of the micro-arc oxidized films to the structural factors and the apatite-induced mechanism were discussed.
Micro-arc oxidation, Titania-based films, In vitro bioactivity
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【期刊论文】Synthesis of nanocrystalline titania films by micro-arc oxidation
憨勇, Yong Han a, b, Seong-Hyeon Hong a, *, Kewei Xu b
Materials Letters 56(2002)744-747,-0001,():
-1年11月30日
Nanocrystalline titania films were synthesized by micro-arc oxidation of titanium substrates in an electrolytic solution using a pulsed power supply. X-ray diffraction (XRD) indicated that the deposited films consisted of a high crystalline anatase phase. Field emission scanning electron microscopy (FESEM) showed that the films were macro-porous with 1–2 Am pores and the matrix was composed of 10–20 nm grains. The adhesion–tension test showed that the films had an adhesive strength of 20F2MPa. Such firmly adhesive, porous and nanocrystalline anatase films are expected to have significant applications as orthopaedic/dental implants and catalysts.
Micro-arc oxidation, Titania film, Nanocrystalline, Adhesive strength
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【期刊论文】Biomimetic apatite coatings on micro-arc oxidized titania
憨勇, Won-Hoon Songa, Youn-Ki Juna, Yong Hana, b, Seong-Hyeon Honga, *
Biomaterials 25(2004)3341-3349,-0001,():
-1年11月30日
Biomimetic apatite coatings on micro-arc oxidized titania films were investigated and their apatite-inducing ability was evaluated in a simulated body fluid (1.0SBF) as well as in a 1.5 times concentrated SBF (1.5SBF). Titania-based films on titanium were prepared by micro-arc oxidation at various applied voltages (250-500V) in an electrolytic solution containing b-glycerophosphate disodium salt pentahydrate (b-GP) and calcium acetate monohydrate (CA). Macro-porous,Ca- and P-containing titania-based films were formed on the titanium substrates. The phase,Ca and P content, morphology, and thickness of the films were strongly dependent on the applied voltage. In particular, Ca- and P-containing compounds such as CaTiO3, b-Ca2P2O7 and a-Ca3(PO4)2 were produced at higher voltages (>450 V). When immersed in 1.0SBF,a carbonated hydroxyapatite was induced on the surfaces of the films oxidized at higher voltages (>450 V) after 28 days,which is closely related to the Ca- and P-containing phases. The use of 1.5SBF shortened the apatite induction time and apatite formation was confirmed even on the surface of the films oxidized at 350 V, which suggests that the incorporated Ca and P in the titania films play a similar role to the Ca-and P-containing compounds in the SBF.
Biomimetic, Micro-arc oxidation, Apatite, Bioactivity, Simulated body fluid
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【期刊论文】Development of a strontium-containing hydroxyapatite bone cement
憨勇, Dagang Guo*, Kewei Xu, Xiaoyun Zhao, Yong Han
Biomaterials 26(2005)4073-4083,-0001,():
-1年11月30日
A new route was developed to synthesis a new type of strontium-containing hydroxyapatite (Sr-HAP) bone cement with precursors of tetracalcium phosphate (TTCP), strontium hydrogen phosphate (DSPA), dicalcium phosphate (DCPA), phosphate acid and water. The processing parameters and fundamental properties including pH value, setting time, compressive strength of final hardened bodyand the cytotoxicityfor serial extracts of each cements were investigated. The result shows that the final product of the cement after setting for 24 h is nonstoichiometic Sr-containing hydroxyapatite (Ca10mxSrxm(HPO4) y(PO4)6y(OH)22m2m, 0oxo1, nSr-HAP) and no other harmful impurities were detected. The pH value of Sr-containing cement pastes approaches to 7.0-7.6 when theyare mixed with a ratio of 1:1 of powder to liquid (P/L) in weight. The setting time of the cement pastes is 4-11 min for the initial one and 10-17 min for the final one when the concentration of diluted phosphate is in a range of 0.5-1.0mol/l. The compressive strengths of the hardened cements with different molar ratios of Sr/(Sr+Ca) after subjected an immersion in simulated body fluid (SBF) increase uniformly from 1 day to 5 days, where they get maximum values, respectively, but then decrease till to 2 weeks. Especiallyfor the CPC-1, with a Sr/(Sr+Ca) molar ratios of 5% in cement powder composition, the largest compressive strength gained at 5 days is 66.57MPa and the lowest one gained at 2 weeks is 44.75 MPa, which matches the value of human bones and can be expected to use in clinic application in repairing the nonloading sites on account of the positive result of cytotoxicity test of the extracts of Sr-containing calcium phosphate cement (Sr-CPC).
Calcium phosphate cement, Sr-containing hydroxyapatite, Biocompatibility, Cytotoxicity
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【期刊论文】Induction of calcium phosphate on IBED-TiOx-coated carbon–carbon composite
憨勇, Tao Fu, Yong Han, Ke-Wei Xu*, Jin-Yong Li, Zhong-Xiao Song
Materials Letters 57(2002)77-81,-0001,():
-1年11月30日
Carbon-carbon composite has mechanical properties similar to human bone, as well as good biocompatibility, but without bioactivity. TiOx film was deposited onto carbon-carbon composite by ion beam-enhanced deposition (IBED) technique, and a porous network was formed on the TiOx film after alkali treatment. The network induced the deposition of calcium phosphate layers with different morphologies and compositions from simulated body fluid and the fast calcification solution.
Carbon-carbon composite, Titanium oxide, IBED, Calcium phosphate
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【期刊论文】Preparation of carbon fiber fabric reinforced hydroxyapatite/epoxy composite by RTM processing
憨勇, TAO FU, JUN-LIANG ZHAO, JIAN-HUA WEI, YONG HAN, KE-WEI XU∗
JOURNAL OF MATERIALS SCIENCE 39(2004)1411-1413,-0001,():
-1年11月30日
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